Updated gemfile to use https
Updated Appraisal for rails 4.0 final and regenerated gemfiles so they would use the secure connection
Added ability to set a name for the "belongs_to" relationship
Added ability to extend a class other than ActiveRecord::Base for the draft
Update README.rdoc to include STI example
Removed :extends_self option
Fixed doc and test model declaration to use ruby 1.8.7 syntax
Merge pull request #5 from finalsite/master

Add some options to make working with single table inheritance easier